Power drive



Dec. 11, 1951 R. B. F EALER 2,578,316

' POWER DRIVE Filed Feb. 18, 1948 s Sheets-Sheet 1 INVENT R f1 g- 2 ROBERT B. PEALER Fh' oRNeYs Dec. 11, 1951 R. B. PEALER 2,578,316

POWER DRIVE Filed Feb. 18, 1948 5 Sheets-Sheet 2 INVLNTOR ROBERT B. PEALER AT ORNEYS R. B. PEALER Dec. 11, 1951 POWER DRIVE 3 Sheets-Sheet 5 Filed Feb. 18, 1948 n W F [NVf/VTOR Roman B. PEHLER B) 154,220, 72am; 37 3M H 770K. NEYS iatented Dec. 1 1, 1951 Robert ,B. Petite Garrettsville, Ohio, assignor to Beaver Pipe Tools, Inc., Warren, Ohio, a. corporation of Ohio Application February 18, 1948, Serial No. 9,270

1 Claim. 1

This invention relates to a power unit comprising a driving motor, a driven chuck, and -in termediate reduction gearing, all mounted on a readily portable frame, such a device being commonly known as a power drive.

One of the objects of the'invention is to provide a power drive in a very compact form adapted to be light enough so that it may be carried from place to place as occasion requires. Another object is to simplify the construction by providing an internal gear rigidly connected to the chuck and forming both the driven member of the gear train and a housing for the meshing driving gear.

More particularly, my invention provides a chuck secured directly to a rotatable housing having internal gear teeth, the housing being secured directly to a supporting spindle suitably journaled in the frame. The spindle provides a desired length of barrel for carrying the overhanging chuck and the arrangement of the gearing delivers the power close to the chuck, reducing tortional stresses.

A feature of the invention relates to the formation of the frame enabling it to be constructed of a single integral unit providing supporting bearings for the chuck spindle. Another feature is provision of means for readily oiling the internal gear and its driving pinion.

Still another feature of the invention is suitable tray for carrying tools orother accessories, the tray being conveniently sul l brted on top of the frame'standards which provide the bearings for the spindle.

My invention is illustrated in the drawings hereof and is hereinafter described in detail and the essential novel features are set out in the claim.

In the drawings, Fig. 1 is a plan of the power drive; Fig. 2 is a front elevation thereof; Fig. 3 is a vertical central section along the axis of the chuck, the motor being shown in elevation, the plane of this section being indicated by the line 3-3 on Fig. 4; Fig. 4 is an end view, looking at the face of the chuck; Figs. 5 and 6 are vertical sections on the correspondingly numbered lines on Fig. 3.

As shown in the drawings, I have provided in this invention a frame which is a single integral casting and as a whole is designated I0. This frame comprises a base portion 1 I, four legs with feet 2 at the four corners and a pair of parallel upright standards l3 and 14 connected by longitudinal braces l5. These standards are bored with aligned cylindrical passageways. In these passageways I mount two bushings and 2| which are preferably identical, each of which has a flange abutting the exterior vertical surface of the standard. The bushings are locked in place by set screws 22 in tapped holes in the standards.

The two bushings 2% are accurately bored to provide a bearing for the rotating spindle 30. This spindle has at one end a thickened portion or head 3| providing an abrupt shoulder between the head and the cylindrical portion of the spindle occupying the bushings. This spindle is shoved into place through the bushings from the right hand end of the machine, which brings an-annular external groove in the spindle just beyond the bushing in the standard [3. A split contracting ring 34 is shoved over the end of the spindle and contracts into the groove, thus locking the spindle rotatably in the bushings.

The head portion 3| of the spindle carries an integral projecting flange 35 which presents a fiat surface toward the right terminating with a cylindrical portion 36 of the spindle head, on which the gear housing about to be described is mounted.

The gear housing at is a cup-like member having a cylindrical part M on which are formed internal gears 42 and a disc-like portion G2 which has a central opening adapted to snugly embrace the enlarged head portion 36 of the spindle.

. When the gear housing is mounted on the spindle head the inner face of its disc portion abuts the flange 35 0f the spindle head, and the parts are secured together by screws passing through one of such parts and threaded in the other. As shown, I have employed fillister-head screws passing through cylindrical openings in the disc portion 42 and are threaded in the spindle flange 35. The result is that the gear housing with its internal gear is rigidly attached to the spindle. 50 designates the chuck which has a planular face at its inner end snugly abutting the outer end of the spindle head and the outer face of the gear housing to which the chuck is rigidly attached. I have shown for this purpose fillister head screws 5| extending through the chuck and threaded into the disc portion of the gear housing. Thus the chuck, gear housing and spindle become all one unitary rigid member rotatable in the frame.

A motor Gil is mounted on the base portion of the frame, preferably with its axis in the vertical plane of the spindle axis, the motor projecting through the upright standard 13. I have shown the motor secured to an upright bracket portion l6 of the base of the frame and steadied by an adjustable screw ll threaded in the base. The armature shaft 6| of the motor projects toward the right into a suitable housing 62 located beneath the spindle carried at the left hand end by the motor frame and at the right hand end by a cylindrical portion 63 occupying an opening in the standard 14.

The armature shaft of the motor carries a pinion 64, shown in dotted lines in Fig. 3, which through suitable reduction gearing indicated at 66 in dotted lines finally drives a pinion 6'1 which meshes with the internal teeth 42. This makes a very direct reduction drive from the motor to the spindle, delivering the power closely adjacent to the chuck.

The housing 40 has a smooth flat left hand edge which for the most part has a running fit with the vertical outer face of the frame standard 14, thus making a substantially dust-tight connection between them. I prefer to provide an oil cup for supplying such lubricant to the interior of the housing. Such cup is shown at in Fig. 2. It is supported by a horizontally extending nipple H which is threaded in the frame standard l4 and carries a drip pipe H discharging directly onto the internal gear teeth 42. By supplying a proper oil to the cup 10 I am able to maintain the gear and its driving pinion thoroughly lubricated.

I have mentioned the legs [2 of the frame which terminate in horizontal feet forming a bench support for the machine. I make these legs cylindrically hollow, as indicated by dotted lines 16 in Fig. 5, and at the inner end of such cavity, I provide an internal thread 19. This enables suitable pipes threaded at the end to be inserted in the legs, if it is desired to provide means for supporting the device at an elevation.

I provide a tray 80 which rests on top of four bosses 8| on the frame standards l3 and I4, and is secured thereto by four cap screws 82 passing through the tray into the bosses, the heads of the screws occupying suitable recesses in the upper face of the tray. This tray furnishes a convenient support for tools, oil can, etc. Suitable holes, as 83, in the tray enable the attachment of a pipe vise, if desired. The tray is also provided on its forward edge with a pair of forwardly projecting spaced ears 84 which make a support on which a chuck wrench may be conveniently held thereby when not in use, the ears being recessed on their upper surfaces to receive the handle of such wrench.

My power drive is well adapted for receiving and rotating a pipe on which some operation, as, for instance, threading, is to be performed. When a hand die stock is used for this operation it is convenient to hold the handle thereof by means of a hook on a rod 9| slidably carried by the frame. I have shown it mounted in ears of a bracket 92 secured on the frame base.

In use, the pipe is mounted and held in the chuck in the usual manner, the projecting idle end of the pipe being supported, if desired, by any suitable pipe rest, not shown. Then, when the motor is energized, as by the actuation of a switch IUD, the chuck and pipe is rotated, and any desired operation such as threading, cutting or reaming may be preformed on the pipe projecting at the right of the chuck.

I claim:

In a power drive, the combination of a frame. a hollow spindle rotatably mounted therein and having a head provided with an annular radially extending flange adjacent to but spaced inward from one end of said spindle and providing radially extending shoulder spaced inward from said end, a cylindrical housing concentrically surrounding said spindle head but spaced radially therefrom and having an annular inwardly directed flange secured to said shoulder in an abutting relationship, said housing flange having a central opening to receive said spindle head, a chuck secured to said housing flange and having its inner face abutting both the end of said spindle and the outer face of the housing flange, internal gear teeth on the cylindrical interior of the housing, and a driving pinion disposed between the spindle and the housing meshing with said gear teeth.

ROBERT B. PEALER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Sweden Oct. 12, 1917 

